Shark sighting in Lake Ontario: ‘realistic threat’ or hoax?

Two brothers were fishing off Wolfe Island near Kingston, Ontario, earlier this month when they spotted a shark.

Or did they?

In a video posted last week, the brothers appear to be reeling in a fish when a dorsal-finned shark surfaces — according to the video uploader, it snatched the catch off the hook — then disappears under the water.

The shark in the video is believed to be a bull shark, "an aggressive carnivore not adverse to freshwater and known to travel inland," the National Postreported.

The video went viral, with some locals now concerned for their safety in the water.

"I think a lot of people aren’t sure if it's a true story or not," Erin Whalen, a waitress at a restaurant on Wolfe Island, said. "But it's got a lot of parents being wary."

Here's another shark image that's getting some serious attention. Brazailian underwater photographer Adriana Basques captured a 26-foot-long whale shark, with its 4-foot-wide mouth open, seemingly ready to chow down on a boat full of fisherman. (In reality, the whale shark was touching the dome of the photographer's camera.)

"It might look scary when you see one with a huge open mouth coming in your direction," Basques toldCaters News Agency. "But they usually have a very good sense of space and will turn before they get too close, although this is not what happened with the particular one in this image."

The optical-illusion photo is up for the People's Choice Award in the Wildlife Photographer of the Year competition held by the Natural History Museum in London.